Title :
Barium evaporation and film degradation of osmium-coated cathode
Author :
Cheng Cheng ; Ji Li ; Zhiqiang Yu
Author_Institution :
Beijing Vacuum Electron. Res. Inst., Beijing, China
fDate :
June 30 2014-July 4 2014
Abstract :
This paper describes the experiments for the evaporation and film degradation of osmium-coated cathode. Evaporating rate and under-heated characters were tested, and SEM & EDS were used. Barium evaporation is the main factor of cathode life degradation under 1080 C. The model of failure caused by evaporation was established.
Keywords :
barium; cathodes; coatings; osmium; scanning electron microscopy; vacuum deposition; Ba; EDS; Os; SEM; barium evaporation; film degradation; osmium-coated cathode; Barium; Cathodes; Degradation; Films; Morphology; Surface morphology; Surface treatment;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2014 Tenth International
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4799-5770-5
DOI :
10.1109/IVESC.2014.6892114
